From CX secrets on Facebook:

"#6290
How to respond to GO pax ask me why EM pax upgraded before him??"

Some of the responses make me quite sad, as per the apparent lack of understanding of own vs other OW elite. One of them suggests to answer EM=DM.

Its as if i'd go flying AA asking for Complimentary Upgrades being a CX frequent flyer. They just wont even recognise you at all.
Unfortunately CX somehow likes OWE more than their own GO.